e2e: Fetch the correct user name

[sstosh]

When fetching the user name, you need to use User.Username
instead of User.Name , as with other tests.

Does this PR introduce a user-facing change?

None

[sstosh]

For example, User.Name returns "Super User" when it's the root user.

# cat test.go
package main

import (
        "fmt"
        "os/user"
)

func main() {
        u, _ := user.Current()
        fmt.Println(u.Name)
}

# go run test.go
Super User

[vrothberg]

LGTM

[Luap99]

/lgtm

[openshift-ci]

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